Thomas j



T.J.BARBOUR. COUPLING FOR TAPPET GAMS.

(No Model.)

Patented Mar. 1', 1898.

Ill HHI n mm um. m I N H UNITED STATES l PATENT OFFICE;

THOMAS J. BARBOITR, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE R'ISDON IRON AND LOCOMOTIVE WORKS, OF SAME PLACE.

COUPLING FOR TAPPET-CAMS.

SPECIFICATION forming part of Letters Patent No. 599,824, dated March 1, 1898. Application filed August 19, 1897. S BIiaLNO. 648,753- (No model.)

To all whom it may concern:

Be it known that I, THOMAS J .BARBOUR, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Couplings for Tappet-Cams; and I do hereby declare that the following is a full, clear, and exact description thereof.

The present invention relates to certain new and useful couplings for securing the tappetcams t'o the drive-shaft of the-battery, which consists in the arrangement of parts and details of construction, as will be hereinafter set forth in the drawings and described and pointed out in the specification. v

Ordinarily the drop of the stamps in an orestamp battery is so arranged that the stamps fall or drop .with a fixed regularity relative to each other-that is, the drop or fall of the stamps is not capable of change or adj ustment as to each other after the cams have once been attached to the drive-shaft; of fall or drop is first given thestamp remains a fixed or unchangeable one; Hence the same cannot be varied to meet the requirements of 'the' various ores being treated or Worked, nor

can the relative drop of the stamps be altered as the millman desires. Suppose the mill is working with five stamps and they fall or drop in the following order: first stamp, third stamp, fifth stamp, second stamp, and, last,

fourth stamp. After working for a given time the millma'n may wish to change or reverse the fall or drop of the stamp, or such change may be desired owing to work upon a differ With the usual manner of Y ent class of ore. connecting the tappet cams to the drive-shaft such a change in the fall or drop of the stamps cannot be accomplished without removing all .the cams from the cam-shaft and readj usting the position of each cam. The-object of my invention is to provide a connecting-wedge for fastening the tappet-cams to the drive-shaft which will permit the position of the said cams being changed or shifted. relative to each other upon the drive-shaft, so as to impart a different drop or fall to the stamps without removing the cams from the shaft. This is an im portant feature in connection with stampbatteries, as it permits of all the cams being Whatever order made with the same templet, so that either cam may be used with any one of the stamps, hence avoiding the necessity of having to entirely strip the cam-shaft in order to change the relative position of the cams to vary the drop or fall of the stamps.

In order to understand the invention, reference should be had to'the accompanying sheet of drawings, forming a part of this application, wherein p 7 Figures 1, 2, 3, and 4 are side views shoW- ing different positions the tappet-cams may be placed in by the use of two of the lockwedges. Fig. 5 is a top plan view of the tappet-cam. Fig. 6 is an end view of a series of the lock-wedges. Fig. 7 is a detail perspec tive View of one of the lock-wedges, and Fig. 8 is a perspective view of the drive-shaft.

The drive-shaft A has cut therein two longitudinal feather ways or grooves l 2, within either of which fits what I term the feather 3 of the semicrescent wedges at 5 6 7 8. I have illustrated in the drawings five cam-wedges the number used for securing the tappet-cams to the drive-shaft of a five or ten stamp mill. These wedges hold the tappet-cams B looked upon the drive-shaft A, the position of each apex, cam 8, of the semicrescent-shaped camwedges; By thus having the feather of the entire series of cam-wedges stepped the arms a of the tappet-cams when said cams are secured to the drive-shaft will assume varying positions,so that during the rotation of the drive-shaft the stamps will be raised dropped at given intervals.

Referring to Fig. 1 of the drawings, it will be observed that cam-wedge 5 is used to lock the tappet-cam B, the. feather of said cam and being fitted in the feather-way 2 of the drive shaft. Locked with this cam-wedge, with its feather in feather-way 2, the cam will stand in a vertical position to the drive-shaft. By

the use of the same cam-wedge the cam may IOO be thrown into a horizontal position as to the drive-shaft simply by fitting the feather 3 into feather-way 1 of the said shaft, Fig. 2. Remove the wedge 5 and employ cam-wedge 8 to lock the cam and the said cam will be thrown into a position upon the drive-shaft corresponding to the first quarter after leaving the stamp if the feather of the wedge be fitted into feather-way 1, Fig. 3. Change the position of the wedge so that the feather thereof will fall into feather-way 2 and the cam will assume the position corresponding to the quarter-stroke prior to engaging the stamp, Fig. 4. Thus with each cam-wedge two different positions may be given to the cam, and with the five cam-wedges ten different positions may be obtained. Transpose the cam-wedges 5 and 8, Figs. 1 and 3, and the position of the cams will be altered; likewise if the cam-wedges, Figs. 2 and 4, be transposed. If either of the cam-wedges be shifted from one cam to another, the positions of the cams will be changed. As before stated, by the use of the five cam-wedges ten distinct changes may be made in the position of any one of the cams. Hence the cams may be shifted or the position thereof be changed to vary the fall or drop of the stamps, as desired. In fact, by providing a series of interchangeable cam-wedges the position of the tappet-cams relative to each other may be varied at will upon the drive-shaft. Hence the drop of the stamps may be varied as required for the proper working of the ore or as desired by the millman with very little trouble.

The stamp-battery is usually constructed with a series of five stamps, and for this reason the cam-wedges are made in series of five, although a duplicate of the series will answer to adjust the cams of a ten-stamp battery. It is very seldom thatless than three stamps are used; but this is immaterial, for, the wedges being interchangeable, they may be used with one, two, three, or more stamps.

By having two feather-ways cut in the driveshaft I am enabled to give two positions to each cam with one cam-wedge or ten positions by the use of five cam-wedges. If only one feather-way be cut in the drive-shaft,only five changes could be made in the position of each cam by the use of the entire set of camwedges. For this reason I prefer to use two feather-ways in the drive-shaft.

The cam-wedges being semicrescent-shaped, preferably, the back face of each describes or is described by an involute curve. To accommodate the cam-wedge or permit of the cam being locked to the drive-shaft, each cam has a seat or socket 9 cut therein which corresponds with the back face of the camwedge. As the shape of each cam-wedge on its back face is the same, each seat or socket cut in the cams will be the same.

Having thus described my invention, what I claim as new, and desire to secure protection in by Letters Patent, is

1. The combination with a series of tappetcams, of a series of interchangeable camwedges for locking the tappet-cams to the drive-shaft of a stamp-battery in relatively different positions so as to control the drop of the stamps, each cam-wedge being provided on its under face with a feather and the feather of each cam-wedge being difierently located relative to the butt of the other cam-wedges.

2. The combination in a stamp-battery of the drive-shaft provided with a feather-way, of a series of cams mounted thereon, and of a series of interchangeable cam-wedges for locking the cams to the drive-shaft, each cam- Wedge being provided with a feather which fits in the feather-way of the drive-shaft, the feather of each cam-wedge being differently located relative to the butt of the other camwedges whereby the position of the cams is altered as to the drop of the stamp with a change of the cam-wedges.

3. The combination with the drive-shaft, of the parallel feather-ways cut therein, the tappet-cams mounted upon the drive-shaft, and the cam-wedges for locking the cams to the drive-shaft, each cam-wedge being provided with a feather which fits in either of the feather-ways of the drive-shaft, the feather of each cam-wedge being differently located relative to the butt of the other cam-wedges, whereby the position of the cams depends upon the feather-way in which the feather of the cam-wedge is fitted.

4. The combination with the drive-shaft, of the tappet-cams mounted thereon, and the interchangeable cam-wedges for locking the tappet-cams to the drive-shaft of a stampbattery, each cam-wedge being capable of adjustment upon the drive-shaft and havingits fastening device differently located relative to the butt of the other cam-wedges whereby each cam-wedge permits of a different position to be given the tappet-cams to vary the drop of the stamps.

In testimony whereof I affix my signature, in presence of two witnesses, this 12th day of August, 1897.

THOMAS J. HARBOUR.

lVitnesses:

N. A. AOKER, E. P. J ONES. 

